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/*
 * @test
 * @bug 8301093
 * @summary Verify failure to intrinsify does not pollute control flow
 * @modules java.base/jdk.internal.util:+open
 *
 * @run main/othervm -Xbatch -XX:-TieredCompilation compiler.intrinsics.TestArraysHashCode
 */

package compiler.intrinsics;

import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class TestArraysHashCode {

    private static final Method vectorizedHashCode;
    private static final int T_BOOLEAN;

    static {
        try {
            var arraysSupport = Class.forName("jdk.internal.util.ArraysSupport");
            vectorizedHashCode = arraysSupport.getDeclaredMethod("vectorizedHashCode",
                    Object.class, int.class, int.class, int.class, int.class);
            vectorizedHashCode.setAccessible(true);
            Field f = arraysSupport.getDeclaredField("T_BOOLEAN");
            f.setAccessible(true);
            T_BOOLEAN = f.getInt(null);
        } catch (Throwable e) {
            throw new RuntimeException(e);
        }
    }

    static int type;
    static byte[] bytes;

    public static void main(String[] args)
            throws InvocationTargetException, IllegalAccessException {
        // read
        bytes = new byte[256];
        type = T_BOOLEAN;
        testIntrinsicWithConstantType();
        testIntrinsicWithNonConstantType();
    }

    private static void testIntrinsicWithConstantType()
            throws InvocationTargetException, IllegalAccessException {
        for (int i = 0; i < 20_000; i++) {
            testIntrinsic(bytes, T_BOOLEAN);
        }
    }

    // ok, but shouldn't be intrinsified due the non-constant type
    private static void testIntrinsicWithNonConstantType()
            throws InvocationTargetException, IllegalAccessException {
        type = T_BOOLEAN;
        for (int i = 0; i < 20_000; i++) {
            testIntrinsic(bytes, type);
        }
    }

    private static int testIntrinsic(byte[] bytes, int type)
            throws InvocationTargetException, IllegalAccessException {
        return (int) vectorizedHashCode.invoke(null, bytes, 0, 256, 1, type);
    }
}